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501e3f2 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 | // -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// SPDX-FileCopyrightText: Copyright (c) 2023 NVIDIA CORPORATION & AFFILIATES.
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCUDACXX___CUDA_SEMAPHORE_H
#define _LIBCUDACXX___CUDA_SEMAPHORE_H
#ifndef __cuda_std__
#error "<__cuda/semaphore> should only be included in from <cuda/std/semaphore>"
#endif // __cuda_std__
#if defined(_CCCL_IMPLICIT_SYSTEM_HEADER_GCC)
# pragma GCC system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_CLANG)
# pragma clang system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_MSVC)
# pragma system_header
#endif // no system header
_LIBCUDACXX_BEGIN_NAMESPACE_CUDA
template<thread_scope _Sco, ptrdiff_t __least_max_value = INT_MAX>
class counting_semaphore : public _CUDA_VSTD::__semaphore_base<__least_max_value, _Sco>
{
static_assert(__least_max_value <= _CUDA_VSTD::__semaphore_base<__least_max_value, _Sco>::max(), "");
public:
_LIBCUDACXX_INLINE_VISIBILITY constexpr
counting_semaphore(ptrdiff_t __count = 0) : _CUDA_VSTD::__semaphore_base<__least_max_value, _Sco>(__count) { }
~counting_semaphore() = default;
counting_semaphore(const counting_semaphore&) = delete;
counting_semaphore& operator=(const counting_semaphore&) = delete;
};
template<thread_scope _Sco>
using binary_semaphore = counting_semaphore<_Sco, 1>;
_LIBCUDACXX_END_NAMESPACE_CUDA
#endif // _LIBCUDACXX___CUDA_SEMAPHORE_H
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